CN106688240A - Method and device for remotely recording video programs - Google Patents

Method and device for remotely recording video programs Download PDF

Info

Publication number
CN106688240A
CN106688240A CN201580048253.9A CN201580048253A CN106688240A CN 106688240 A CN106688240 A CN 106688240A CN 201580048253 A CN201580048253 A CN 201580048253A CN 106688240 A CN106688240 A CN 106688240A
Authority
CN
China
Prior art keywords
fragment
record identifier
identifier receiver
remote server
record
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201580048253.9A
Other languages
Chinese (zh)
Other versions
CN106688240B (en
Inventor
D·萨尔托里
P·萨巴蒂尔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sagemcom Broadband SAS
Original Assignee
Sagemcom Broadband SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sagemcom Broadband SAS filed Critical Sagemcom Broadband SAS
Publication of CN106688240A publication Critical patent/CN106688240A/en
Application granted granted Critical
Publication of CN106688240B publication Critical patent/CN106688240B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/27—Server based end-user applications
    • H04N21/274—Storing end-user multimedia data in response to end-user request, e.g. network recorder
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
    • H04N21/4147—PVR [Personal Video Recorder]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4334—Recording operations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
    • H04N21/4335—Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/632—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

The invention relates to a method for remotely recording a video program received in the form of a bitstream by at least one so-called 'recording' receiver that must record the video program on a remote server by using a communication network. The method is implemented by each recording receiver and includes, for each recording receiver, steps of: obtaining (3051) a compression factor of the video program; dividing (3054) the bitstream into a set of consecutive segments on the basis of the obtained compression factor; determining (3055) a subset of segments to be sent to the remote server from the set of consecutive segments on the basis of a shift value and the compression factor, the shift value being a remainder from the integer division of a random number, which is determined by the recording receiver, by the compression factor; and sending the segments from the determined subset of segments to the remote server.

Description

For the method and apparatus of long-range record video frequency program
The present invention relates to a kind of method of the long-range record for video frequency program, can remotely record expression video frequency program Binary stream reception device, be able to record that represent video frequency program binary stream server unit and including the clothes The system for recording video frequency program for realizing the recording method of business device device and at least one client terminal device.
Have seen that the surge and the increase of video frequency program of the means for accessing video frequency program (or TV programme) recent years. Therefore, although available in the 1980s only analog television broadcast network, current individual can pass through such as TDT ( Face DTV) radio network and ADSL (asymmetric digital subscriber line) and 3G/4G-LTE (three/forth generation) television broadcasting Many digital TV broadcasting networks of network access video frequency program.Can such as video screen, computer screen, digital flat panel or These video frequency programs (or TV programme) are watched in many display devices of smart phone.The increase of video frequency program mainly due to Represent the digitlization of the data of these video frequency programs.This is because for almost identical quality, needed for digitized video program Transmission bandwidth much smaller than the transmission bandwidth needed for analog video program.Therefore for constant picture quality, digitlization is caused Quantity of the quantity of transmissible digitized video program much larger than analog video program in identical communication channel.
The digitlization of video frequency program includes sampling, and the mould of compression expression video frequency program is then carried out with audio-visual data compressed format Intend data.Presence includes video data compression form, Audio data compression form and Voice ＆ Video data-reusing and synchronization The various audio-visual data compressed formats of form.
H264/AVC forms (parts of ISO/IEC 14496-10-MPEG-4 the 10th, advanced video coding/ITU-T H.264) be currently at most be used for broadcast video program compressed format.However, this form by certainty by emerging to resolution ratio (ISO/IEC 23008-2-MPEG-H part 2s, efficiently regard the HEVC standard of the very high more preferable compression performance of video offer Frequency coding/ITU-T is H.265) quick replacement.
AAC audio compression formats (ISO/IEC 13818-7, ISO/IEC 14496-3) are used to compress audio frequency more very much Data.
MPEG-TS encapsulation format (ISO/IEC 13818-1) Jing is often particularly by DVB (DVB) and ATSC (Advanced Television Systems Committee) broadcast standard is used to that video flowing and audio stream to be encapsulated in same binary stream and be guaranteed The synchronization of these streams.
Very common is personal hope record audiovisual material.For receiving many systems of digitized video program, example The digital decoder (so-called decoder) for such as associating with the residential gateway (so-called internet box) for being connected to internet The device for recording binary stream corresponding with video frequency program with such as hard disk.Hereinafter, to put it more simply, by digital decoding The component of device and residential gateway composition will be referred to as " receiver ".The tape deck of receiver is generally limited, and cannot store Substantial amounts of data.
One possible solution it will is come in the long-range record server of internet using the network capacity of receiver Binary stream is preserved on (referred to as " remote server ").Although however, receiver has binary system corresponding with video frequency program The compatible receiving velocity of the reception of stream, but receiver has very limited amount of transfer rate, it is impossible to within reasonable time It is compatible to remote server transmission binary stream.Here, transfer rate is defined as receiver can send the theoretical maximum of data Speed.
It is an object of the invention to solve the above problems.Specifically, it is contemplated that proposing one kind, make must be long-range Multiple receivers of same video program are recorded on server can be cooperated to record remembering for long-range for the video frequency program Record video frequency program method, can realize methods described reception device and server unit and including the server dress Put with least one client terminal device and realize the video frequency program record system of methods described.
For this purpose, according to the first aspect of the invention, the present invention relates to a kind of method of record video frequency program, the video section Mesh is by must be by video frequency program record at least one receiver (referred to as record identifier receiver) on the remote server with two The form of system stream is received, and each record identifier receiver is connected to the remote server and by transfer rate by communication network Characterize, the binary stream is characterized by code rate, it is characterised in that methods described is realized and right by each record identifier receiver In record identifier receiver, the method comprising the steps of：Obtain video frequency program compressibility factor；Will according to the compressibility factor for being obtained The binary stream is divided into the set of continuous fragment；According between deviant and fragment corresponding with the compressibility factor Difference determines the subset of the fragment that send to the remote server from the set of the continuous fragment, and the deviant is The random number determined by the record identifier receiver divides exactly the remainder of the compressibility factor；And in the subset of fragment by determined by Fragments for transport to the remote server to preserve.
By may when between multiple record identifier receiver allocated segment transmission, methods described causes that record can not be made The transfer rate saturation of receiver.
According to an embodiment, the compressibility factor is according to video frequency program code rate, the transmission speed of record identifier receiver The quantity of the connection that rate, the quantity of record identifier receiver that record video frequency program, the remote server are allowed and/or by institute State the quantity of the video frequency program that record identifier receiver is recorded simultaneously to calculate.
So, the fragment is sent using the transfer rate of the transfer rate less than or equal to record identifier receiver, but It is contemplated that other parameters are in order to better adapting to transfer rate.
According to an embodiment, the compressibility factor is by the record identifier receiver or by the compressibility factor is sent The remote server to the record identifier receiver is calculated.
Compressibility factor is calculated by record identifier receiver to cause to can ensure that the transmission that compressibility factor is actually suitable for record identifier receiver Speed.Further, since remote server intensively understands all record identifier receiver of request program, calculated by remote server and pressed The contracting factor allows compressibility factor to adapt to record identifier receiver set.
According to an embodiment, according to the size measurement of the quantity for representing binary data, the collection of the continuous fragment Fragment in conjunction has fixed size.
According to an embodiment, according to the size measurement for representing the duration, the piece in the set of the continuous fragment Section has fixed size, each fragment in the set of the continuous fragment and fixed time interval pair in video frequency program Should.
The step of being conducive to restructuring binary stream corresponding with video frequency program using the fragment of fixed size.
According to an embodiment, the fragment in the set of the continuous fragment goes out according to them in the binary stream Existing order sorting, and when it is determined that to send to the fragment of the remote server subset when, the record connects Device is received by beginning stepping through the set of the continuous fragment from fragment corresponding with the deviant, the continuous fragment is selected Following multiple fragments in set, i.e. the plurality of fragment is spaced apart the fragment of the quantity equal to the difference between the fragment.
Then, record identifier receiver only sends the subset of the fragment compatible with its transfer rate.
According to an embodiment, before the fragment in the subset for transmitting the fragment, the record identifier receiver is to institute State remote server send represent the video frequency program including the deviant, the compressibility factor and represent the fragment Size value metadata set.
Set of metadata etc. enables remote server to recombinate the fragment.
According to an embodiment, being informed by remote server when record identifier receiver must record the another of the video frequency program When one record identifier receiver is associated with identical deviant, the record identifier receiver interrupts the transmission of the fragment.
So, it is to avoid same fragment is unintentionally transmitted several times.
According to an embodiment, the record identifier receiver is also by the fragment or described in the set of the continuous fragment Fragment in the subset of fragment is stored in the local storage unit of remote server.
The fragment is stored in local storage unit so that record identifier receiver for example can be realized showing regarding for time shift The application of frequency program.
In one embodiment, the record identifier receiver periodically sends to authorize and deletes piece to the remote server The request of section, and in the case where receiving to the positive response for authorizing the request for deleting fragment, deletion record is at described Fragment in ground memory cell.
By the way that the decision-making for deleting fragment is concentrated at remote server, remote server can control the guarantor of the fragment Deposit.
According to an embodiment, by least part of record of the binary stream on this remote server it Afterwards, the record identifier receiver sends the request for showing the video frequency program to the remote server, from the remote server And/or receive corresponding with the binary stream from least one other record identifier receiver of the fragment for saving the binary stream Fragment, and the binary stream of recombinating is to show.
Therefore, remote server is not only one can respond to the request for showing the video frequency program of record. In that way it is possible to if avoid the overload of remote server.
According to the second aspect of the invention, the present invention relates to it is a kind of record video frequency program method, the video frequency program by Must be by video frequency program record at least one receiver (referred to as record identifier receiver) on the remote server with binary system The form of stream is received, and each record identifier receiver is connected to the remote server and by transfer rate table by communication network Levy, the binary stream is characterized by code rate.Methods described is comprised the following steps when being realized by the remote server：Obtain At least one collection of metadata is obtained, each collection of metadata is sent and including deviant by record identifier receiver, the deviant It is remainder that the random number determined by the record identifier receiver divides exactly the compressibility factor obtained by the record identifier receiver；Sending The record identifier receiver associated with identical deviant is found in the record identifier receiver set of the metadata of the video frequency program；For Each the different deviant for being received sends transmission and authorizes at least one different record identifier receiver；Award from transmission is received The record identifier receiver of power receives binary stream in the form of fragment, and each record identifier receiver is according to the compressibility factor by described two System flow point is cut into the set of continuous fragment, and according between the deviant and fragment corresponding with the compressibility factor Difference determine that each record identifier receiver is sent to the fragment of the remote server from the set of the continuous fragment；With And the binary stream of recombinating is so that the binary stream is stored in the memory cell of the remote server.
Therefore, remote server controls the record of binary stream corresponding with the video frequency program to be recorded.
According to an embodiment, when in each the different deviant for being received from least one record identifier receiver After receiving the fragment, when lacking the restructuring for preventing the binary stream of some fragments, the remote server to At least one record identifier receiver sends and represents the information of at least one fragment lost, so that sending the fragment of each loss.
Therefore, remote server is guaranteed without fragment loss.
It is described long-range after the request for authorizing deletion fragment is received from record identifier receiver according to an embodiment Server sends the deletion mandate of the list including the fragment to be deleted to the record identifier receiver.
Therefore, remote server control is stored in the deletion of the fragment in the local storage unit of record identifier receiver.
According to an embodiment, at least one record identifier receiver is beaten in each the different deviant for being received Before opening connection, the remote server waits the predefined cycle.
Therefore, remote server guarantees to identify all record identifier receiver that record video frequency program.
According to an embodiment, when fragment is received, each fragment and information association, described information includes representing institute State the information of position of each fragment in binary stream and represent the information of the record identifier receiver for preserving each fragment.
In one embodiment, when after the binary stream of recombinating, the remote server connects from the first record When receiving the request of the device reception display video frequency program, the remote server constructs list, and the list is directed to the binary system At least one fragment of stream indicates at least one second record identifier receiver for including the local storage unit for preserving the fragment.
So, when display video programs, record identifier receiver can be asked to another record identifier receiver rather than to remote server Fragment is sought, this is avoided transships remote server.
According to the third aspect of the invention we, the present invention relates to a kind of can remotely record the binary system for representing video frequency program The reception device of stream, it is characterised in that the reception device includes：For obtaining the dress of the compressibility factor of the video frequency program Put；For the binary stream to be divided into the device of the set of continuous fragment according to the compressibility factor for being obtained；For basis Difference between deviant and fragment corresponding with the compressibility factor determines from the set of the continuous fragment will be sent To the device of the subset of the fragment of remote server device, the deviant is that the random number determined by the reception device divides exactly The remainder of the compressibility factor；For the fragment in the subset of the fragment by determined by send to the remote server device with Just the device for preserving.
According to the fourth aspect of the invention, the present invention relates to a kind of clothes for being able to record that the binary stream for representing video frequency program Business device device, the server unit includes：For obtain at least one collection of metadata device, each collection of metadata by Reception device sends and including deviant, and the deviant is that the random number determined by the reception device divides exactly and connect by described The remainder of the compressibility factor that receiving apparatus are obtained；For seeking in the set for sending the reception device of metadata of the video frequency program Look for the device of the reception device associated with identical deviant；For being directed to each the different deviant for being received at least one Individual different reception device sends the device that transmission is authorized；For from receive transmission authorize reception device in the form of fragment The device of binary stream is received, the binary stream is divided into continuous fragment by each reception device according to the compressibility factor Set, and according to the difference between the deviant and fragment corresponding with the compressibility factor from the continuous fragment Determine that described each reception device is sent to the fragment of the server unit in set；And for the binary stream of recombinating So as to the device being stored in the binary stream in the memory cell of the server unit.
According to the fifth aspect of the invention, the present invention relates to a kind of system for recording video frequency program, the system includes According at least one reception device and the server unit according to fourth aspect of the third aspect.
According to the sixth aspect of the invention, the present invention relates to a kind of computer program comprising instruction, the instruction For being realized according to the method for first aspect or according to the by described device in computing device of the described program by device The method of two aspects.
According to the seventh aspect of the invention, the present invention relates to a kind of storage dress of computer program of the storage comprising instruction Put, it is described to instruct for realizing the method according to first aspect by described device in computing device of the described program by device Or according to the method for second aspect.
Above-mentioned feature of the invention and other by the following description by reading example embodiment come more clearly Appear, the description is provided with regard to accompanying drawing, in accompanying drawing：
Figure 1A schematically shows the example of the realization of the method for the long-range record for video frequency program of the invention, Plurality of receiver cooperation to record identical video frequency program on the remote server,
Figure 1B is shown schematically on the display for be connected to receiver and shows the video for preserving on the remote server First example of the realization of program,
Fig. 1 C are shown schematically on the display for be connected to receiver and show the video for preserving on the remote server Second example of the realization of program,
Fig. 2A schematically shows the hardware structure of the reception device that can realize long-range recording method of the invention Example,
Fig. 2 B schematically show the hard of the remote server device that can realize long-range recording method of the invention The example of part framework,
Fig. 3 schematically describes the showing according to the method for remotely recording video frequency program of the invention realized by receiver Example,
Fig. 4 schematically describes will be sent to the video frequency program of remote server by what receiver was realized for determination expression Binary stream subdivision method,
Fig. 5 schematically describes by the method that video frequency program is remotely recorded according to the present invention of remote server realization First example,
Fig. 6 schematically describes by the method that video frequency program is remotely recorded according to the present invention of remote server realization Second example,
Fig. 7 schematically describes the method for the fragment of the binary stream of the deleted representation video frequency program realized by receiver Example,
Fig. 8 schematically describes by the method that video frequency program is remotely recorded according to the present invention of remote server realization 3rd example,
Fig. 9 schematically describes and record is provided in the display device for be connected to receiver long-range by what receiver was realized The example of the method for the display of the video frequency program on server,
Figure 10 schematically describes and record is provided in the display device for be connected to receiver by what remote server was realized The example of the method for the display of video frequency program on the remote server.
Figure 1A schematically shows the example of the realization of the method for the long-range record for video frequency program of the invention, Plurality of receiver cooperation is recording on the remote server identical video frequency program.Hereinafter, connecing for the present invention can be realized Receive device to be referred to as " record identifier receiver ".Figure 1A is depicted and is connected to long-range clothes including by the communication network 100 of such as internet The network of multiple record identifier receiver 101 to 108 of business device 109.Video program providers (not shown) to record identifier receiver 101 to 108 set for sending video frequency program.Each record identifier receiver 101 to 108 has being used for for such as TDT, ADSL, 3G or 4G interface Receive the interface of video frequency program.It is assumed here that the video frequency program receiving interface of record identifier receiver 101 to 108 is all identical.So, If without these binary streams of erroneous effects during its transmission, the binary system received by each record identifier receiver 101 to 108 Stream is all identical.Each record identifier receiver 101 to 108 also have allow it to by communication network 100 and remote server The network interface of 109 communications.It is assumed here that all record identifier receiver have identical network interface, therefore they have identical Receiving velocity and identical transfer rate.Additionally, each record identifier receiver 101 to 108 have such as hard disk memory cell with For preserving binary stream corresponding with video frequency program.
Remote server 109 has：Network interface, for being led to record identifier receiver 101 to 108 by communication network 100 Letter；The storage device of such as one or more hard disks, for storing binary stream corresponding with video frequency program；And video section Mesh database, including the descriptive data (or metadata) of each binary stream.
In example in figure ia, record identifier receiver 101 to 108 must record identical video frequency program in remote service On device.For this purpose, the method according to describing below with reference to Fig. 3, each record identifier receiver 101 to 108 will be corresponding with video frequency program Multiple fragments of binary stream are sent to remote server, and remote server proceeds the restructuring of binary stream.It is many with described The transmission of individual fragment is parallel, and each record identifier receiver 101 to 108 sends first number of description video frequency program and the plurality of fragment According to.The binary stream of restructuring is stored in the memory cell of remote server.Metadata is stored in video program data storehouse In and with restructuring binary stream associate.
Fig. 2A schematically shows can realize the record reception device of long-range recording method of the invention (referred to as " record identifier receiver ") 20 hardware structure example.Record identifier receiver 20 is identical with record identifier receiver 101 to 108.Record is received Device 20 includes what is connected by communication bus 205：Processor or CPU (CPU) 200；Random access memory (RAM)201；Read-only storage (ROM) 202；Memory cell 203 or memory medium reader, such as SD (secure digital) card is read Take device or USB (USB) keys or hard disk drive (HDD)；At least one interface 204, for handing over other devices Change data.The memory cell of record identifier receiver 20 has small size and can only store the binary stream of limited quantity.At one In embodiment, interface 204 is using video frequency program receiving interface, network interface and for (for example, calculating with client terminal device Machine, flat board or smart phone) communication interface.Interface 204 can for example include receiving and regarding that video program providers are sent The adsl interface of the corresponding binary stream of frequency program etc..Additionally, interface 204 allows to be connect with remote server 109 and other records Receive device exchange data.In addition, user can be using interface 204 for from client terminal device control record identifier receiver 20 and for example Select the video frequency program to be recorded.
Processor 200 is able to carry out from ROM 202, from external memory storage (not shown), from storage medium or from communication Network is loaded into the instruction in RAM 201.When electricity in record identifier receiver 20, processor 200 can read from RAM 201 and instruct And perform the instruction.These instructions form computer program, and the computer program causes processor 200 to realize with regard to record Receiver 20 and all or some algorithms and the step of Fig. 3, Fig. 4, Fig. 7 and Fig. 9 description.
Fig. 2 B schematically show can realize the remote server device of long-range recording method of the invention (referred to as " remote server ") 21 hardware structure example.Remote server 21 is identical with remote server 109.Remote server 21 Including what is connected by communication bus 215：Processor or CPU (CPU) 210；Random access memory (RAM) 211；Read-only storage (ROM) 212；Memory cell 213 or memory medium reader, such as SD (secure digital) card reader or USB (USB) keys or hard disk drive (HDD)；At least one interface 214, for exchanging number with other devices According to.The memory cell 213 of remote server 21 has large scale and causes that substantial amounts of binary stream can be stored and by first number According to the video program data storehouse associated with each binary stream for being recorded.In one embodiment, memory cell 213 can be with It is to be connected to the long-range memory cell of remote server 21 in the outside of remote server 21 and by communication network.Interface 214 So that parallel multiple connections can be used, thus can simultaneously with multiple record identifier receiver exchange datas.
Processor 210 is able to carry out from ROM 212, from external memory storage (not shown), from storage medium or from communication Network is loaded into the instruction in RAM 211.When electricity on remote server 21, processor 210 can read from RAM 211 and instruct And perform the instruction.These instructions form computer program, and the computer program causes processor 210 to realize with regard to long-range Server 21 and all or some algorithms and the step of Fig. 5, Fig. 6, Fig. 8 and Figure 10 description.
Described below all or some algorithms and step therefore can be by by such as DSP (digital signal processors) or micro- The programmable machine set of instructions of controller realizes in a software form, or by such as FPGA (field programmable gate array) Or the machine or personal module of ASIC (special IC) are realized in the form of hardware.
Fig. 3 schematically describes by the long-range record for video frequency program of the invention of record identifier receiver realization The example of method.In this example we focus on record identifier receiver 101, and it realizes the method in Fig. 3.However, we will be Consider that record identifier receiver 102 to 108 realizes identical method simultaneously in this example.The method starts from step 301, in the step Period user selects to record the video frequency program on remote server 109.In step 302, record identifier receiver 101 is to long-range Server sends a request for opening connection.For example, HTTPS (secure hyper text transport associations are opened in the request of record identifier receiver 101 View) connection.
In step 303, record identifier receiver 101 receives from remote server 109 and agrees to open connection.Then opening connects Connect.
In step 304, record identifier receiver 101 creates the metadata of such as XML (extensible markup language) form.These Metadata includes the information of the start time for representing selected video frequency program, represents the finish time of selected video frequency program Information, the information of the title of mark program and represent and be used to video frequency program is sent into record connects by video program providers Receive the information of the transmission channel of device 101 to 108.
Regard with selected because the transfer rate of record identifier receiver 101 is insufficient to allow for being transmitted to remote server 109 The corresponding binary stream of frequency program, so record identifier receiver 101 only sends the subdivision of the binary stream.For this purpose, record is received Device 101 determines which subdivision of binary stream will be sent to long-range clothes during step 305 according to the method with regard to Fig. 4 descriptions Business device 109.The purpose of step 305 is to prevent all record identifier receiver from sending identical subdivision.
Within step 306, receiver 101 is using the letter for representing the subdivision of the binary stream of determination during step 305 Cease to supplement metadata.
In step 307, record identifier receiver 101 starts to transmit two determined during step 305 to remote server 109 The subdivision of system stream.
Continue transmit, as long as long as determined by subdivision without completely send or remote server do not ask stop Transmission.After step 307, record identifier receiver 101 terminates connection.
Fig. 4 schematically show it is corresponding with the step of Fig. 3 305 by record identifier receiver 101 realize for determine represent The method for sending the subdivision of binary stream to the video frequency program of remote server.The method starts from step 3051, Record identifier receiver 101 obtains compressibility factor F during the step.In one embodiment, by record identifier receiver 101 by remembering The transfer rate of record receiver 101 calculates compressibility factor F divided by the code rate of video frequency program.Here we assume that record connects Receive the code rate that device knows each video frequency program that it is received.
In step 3052, record identifier receiver 101 proceeds the calculating of random positive integer A of non-zero.
In step 3053, record identifier receiver 101 determines deviant S (illustrating below).Deviant S is calculated as random number A divides exactly the remainder of compressibility factor F.
In step 3054, record identifier receiver 101 is divided into binary stream corresponding with the video frequency program to be recorded continuously The set of fragment, the order that the fragment in the set of continuous fragment occurs according to the fragment in binary stream is sorting. In one embodiment, record identifier receiver 101 will according to the measurement of the size of the quantity (that is, bit number) for representing binary data Binary stream is divided into the fragment of fixed size TB.The size is arbitrarily defined and identical in all record identifier receiver.
In step 3055, record identifier receiver 101 determines which fragment in the set of continuous fragment must be sent to Remote server 109.For this purpose, the fragment in the set of continuous fragment is solved according to the order that they occur in binary stream Analysis.Record identifier receiver 101 closes the index corresponding to each fragment and the position of each fragment in the set of continuous fragment Connection.Record identifier receiver 101 is begun stepping through in the set of the continuous fragment of Resource selection of continuous fragment by the fragment from index S Following multiple fragments, i.e. the plurality of fragment is spaced apart the fragment that quantity is equal to F, i.e. record identifier receiver 101 selects index I The fragment of=S+F.x, wherein x are positive integer or zero so that I is less than or equal to value N (equal to the fragment being included in binary stream Sum).So, record identifier receiver 101 only sends the subset of N/F fragment in the set of continuous fragment.
In step 3056, record identifier receiver 101 is represented the information of the size of each fragment by insertion wherein, is represented The information of deviant S and if record identifier receiver 101 just starts to calculate compressibility factor F, represents the value of compressibility factor F supplementing Metadata.
In one embodiment, record identifier receiver 101 is by each fragment and includes each fragment in continuous fragment The meta data file of the largest index of index and fragment in set is associated.Each meta data file is when homologous segment is sent It is sent to remote server 109.
When record identifier receiver quantity (here, 8) equal to compressibility factor F and each record identifier receiver 101 to 108 When calculating different deviants S, record identifier receiver action in complementary fashion, and constitute all fragments of binary stream and sent To remote server 109.
If the record identifier receiver in the middle of record identifier receiver 101 to 108 calculates identical deviant S, remote server 109 prevent some record identifier receiver continuation from transmitting their fragment according to the method with regard to Fig. 5 descriptions calculates only to retain One record identifier receiver of deviant S.Particularly can occur when the quantity of record identifier receiver is more than compressibility factor F this Situation.
If the quantity of record identifier receiver is less than compressibility factor F, there is remote server 109 possibly cannot receive and want The risk of the corresponding all fragments of video frequency program of record.In this case, according to the method described with regard to Fig. 5, long-range clothes Business device 109 will ask record identifier receiver to send the fragment lost.
In one embodiment, record identifier receiver 101 to 108 does not calculate compressibility factor F.Then compressibility factor F is really Surely it is left to remote server 109, remote server 109 that compressibility factor F is sent into record identifier receiver 101 to 108.With regard to figure 8 descriptions are determined the example of the method for compressibility factor F by remote server 109.
Each fragment transfer rate of itself is dramatically increased with the meta data file of each fragment association.In a reality In applying mode, in order to reduce transfer rate, record identifier receiver 101 does not associate each fragment with meta data file.Here is implemented In mode, we will subsequently see that remote server 109 must analyze each fragment to determine according to what order restructuring two System stream.
In one embodiment, record identifier receiver 101 to 108 at least one of is worked as record identifier receiver and (for example, is recorded Receiver 101) preserve continuous fragment in its memory cell 203 set in fragment or continuous fragment set in N/ Fragment in the subset of F fragment.These fragments can be preserved for example to realize time-shifted service according to the time.
In one embodiment, the record identifier receiver 101 that fragment is saved in its memory cell 203 is realized deleting institute The local policy (for example, by deleting oldest fragment) of the fragment of preservation.
In one embodiment, record identifier receiver 101 is cooperated so that basis is with regard to Fig. 6 and Fig. 7 with remote server 109 The method of description determines which fragment preserved in its memory cell can be deleted.
In one embodiment, record identifier receiver 101 is measured binary system flow point according to the size for representing the duration Into the fragment of fixed size TD.The size is arbitrarily defined and identical in all record identifier receiver.This embodiment needs Binary stream corresponding with the video frequency program to be preserved is analyzed to find the image being included in binary stream.Binary stream Analysis can be based on for example to the search of the timestamp in binary stream, such as during the performance being present in MPEG-TS encapsulation format Between stamp (PTS) or decoded time stamp (DTS).Each image in binary stream and the performance moment for indicating respectively each image Associate with DTS marks with the PTS marks at the decoding moment of each image.In one embodiment, binary stream is divided into Fragment includes binary stream is divided into the continuous fragment of duration T D based on the PTS stamps associated with image.
In one embodiment, record identifier receiver can simultaneously record multiple video frequency programs.So compressibility factor F must be fitted In the quantity of the program to be recorded.For example, if multiple programs are recorded simultaneously, compressibility factor F is record identifier receiver 101 Result of the transfer rate divided by the code rate sum of each to be recorded video frequency program.
Fig. 5 schematically shows the of the method for the long-range record for video frequency program realized by remote server 109 One example.In step 501, (for example a, record identifier receiver of the remote server 109 from record identifier receiver 101 to 108 101) connection request is received.In step 502, remote server 109 allows to be connected with record identifier receiver 101.
In step 503, remote server 109 receives the first number sent by record identifier receiver 101 during step 306 According to.Then, remote server 109 obtains the description of video frequency program, specifically, represents the letter of the time started of video frequency program Breath, the information of the end time of expression video frequency program and deviant S calculated by record identifier receiver 101.If also do not have from The metadata for being received from another record identifier receiver that must record identical video frequency program calculates it, then remote server 109 Holding for video frequency program is calculated from the information of the end time of the information and expression video frequency program of the time started for representing video frequency program Continuous time D.
During the step 504, remote server 109 by deviant S for being received with may be from recording identical video Other deviants S that other record identifier receiver (102 to 108) of program are received are compared.If demonstrated record receiver 102 Record identifier receiver in the middle of 108 has sent identical deviant S, then in step 506, remote server 109 is to record Receiver 101 sends message to indicate that it stops at during step 505 transmission of its fragment and beats during being released in step 502 The connection opened.All fragments that record identifier receiver 101 has sent are refused by remote server 109.
If sending deviant S without other record identifier receiver, remote server 109 realizes step 507.In step During 507, remote server 109 receives the fragment sent by record identifier receiver 101.
In step 508, remote server 109 starts restructuring binary stream corresponding with video frequency program.For this purpose, for regarding Frequency program is arranged end to end to form file from all fragments that record identifier receiver 101 to 109 is received.In an enforcement In mode, remote server 109 using the index with each fragment association and including each fragment meta data file To be ranked up to fragment.Additionally, during step 508, remote server 109 exists the meta-data preservation for describing video frequency program In its video program data storehouse, and for each fragment so that can recognize which record identifier receiver sends the letter of the fragment Breath.
In step 509, remote server 109 is checked and receive all fragments.For this purpose, remote server 109 checks reality The all indexes from index " 1 " up to the largest index of fragment are had been received by border.If situation is so, remote server 109 during the step 511 statement recombinated binary stream corresponding with video frequency program and during step 512 release it is connected It is connected to each connection of record identifier receiver 101 to 108.
If proving that index is lost, in the request record identifier receiver 101 to 108 of step 510 period remote server 109 At least one transmission and loss the corresponding fragment of index.It is the step of having been described above 509 after step 510.
The request with the corresponding fragment of index lost can in various manners be retransmitted.
In one embodiment, remote server 109 by the list of the index of loss send to record identifier receiver 101 to A record identifier receiver of homologous segment is sent in 109.
In another embodiment, it is known that remote server 109 must receive the different deviants of F with can recombinate with The corresponding binary stream of video frequency program, if receiving the values different less than F, remote server 109 determines which or which A little deviants S are lost.Deviant S of loss is sent to record identifier receiver 101 to 108 at least one of to be worked as record and receives Device so that it or they can determine which fragment must be sent.With send fragment index list compared with, send one or More deviants cost in terms of speed is relatively low.
Fig. 6 schematically shows for remotely recording the method for video frequency program realized by remote server 109 Two examples.It is stored in the memory cell 203 of record identifier receiver 101 by increasing to realize deleting with regard to the method for Fig. 6 descriptions The tactful step of fragment come supplement with regard to Fig. 5 description method.The method include respectively with step 501 to 506 and 508 to 512 identical steps 601 are to 606 and 608 to 612.Step 507 is replaced by step 6071,6072,6073 and 6074.Here Assume that the metadata received during step 603 includes indicating whether fragment is stored in depositing for record identifier receiver 101 in method In storage unit 203, and if situation is so, the information which fragment is saved.These metadata are stored in long-range clothes In the video program data storehouse of business device 109.For example, include with the meta data file of each fragment association and indicate that each fragment is The information that the no record identifier receiver for being sent each fragment is preserved.
During step 6071, remote server 109 receives fragment.In step 6072, remote server 109 is by ginseng Examine the file with the fragment association to determine whether the fragment is stored in the memory cell 203 of record identifier receiver 101.If Situation is not that so, then to determine whether it has been received by record identifier receiver 101 during the step 6074 necessary for remote server 109 The all fragments for sending.If having been received by all fragments to be sent by record identifier receiver 101, remote server 109 is real Existing step 608.Or, record identifier receiver 101 waits new fragment and returns to step 6071 when new fragment is received.
If determining that the fragment has been recorded receiver 101 and has preserved in step 6072 period remote server 109, far Journey server 109 sends the request deleted with the relevant fragment of record identifier receiver 101 during step 6073, so that from note The memory cell 203 of record receiver 101 deletes associated clip.Then, remote server 109 realizes step 6074.
Fig. 7 schematically depict by least one of record identifier receiver 101 to 108 (for example, record identifier receiver 101) The example of the method for the fragment of the binary stream of the deleted representation video frequency program of realization.The method of Fig. 7 is deleting with regard to Fig. 6 descriptions Except the replacement of method.The method of Fig. 7 is compatible with the method described with regard to Fig. 5, and can by record identifier receiver 101 have started to by The fragment sends to remote server 109 and realizes at any time.For example, record identifier receiver 101 can be will be with video The corresponding binary stream of program realizes Fig. 7 method after recording on remote server 109.Additionally, as one in the method for Fig. 6 Sample, it is assumed that the metadata received during step 503 includes indicating whether each fragment is stored in note for each fragment Information in the memory cell 203 of record receiver.These metadata are previously stored in long-range clothes when the fragment is received In the video program data storehouse of business device 109.
In step 701, record identifier receiver 101 checks whether fragment is stored in its memory cell 203.If no Fragment is stored in memory cell 203, then the latent period T in step 706 of record identifier receiver 101.Step 706 causes to press Whether periodically check according to cycle T can delete the fragment from memory cell 203.
If fragment is present in memory cell 203, checks whether in step 702 period record identifier receiver 101 and be in Preservation mode.Preservation mode is the operator scheme of record identifier receiver 101, wherein, record identifier receiver 101 must store continuous fragment Set in fragment or continuous fragment set in fragment subset in fragment.In such a mode, it is stored in storage Fragment in unit 203 cannot be deleted.For example, can be swashed using the client terminal device for being connected to record identifier receiver 101 by user Preservation mode living.If record identifier receiver 101 is in preservation mode, record identifier receiver realizes step 706.
If record identifier receiver is not at preservation mode, in step 703, record identifier receiver 101 is to remote server 109 transmission deletions make can request that.If record identifier receiver 101 is not received by it after the predefined cycle less than T Request any response, then record identifier receiver 101 realize step 706.On the other hand, if record identifier receiver 101 receive it is right The response of its removal request, then record identifier receiver 101 delete in step 705 and sent by record identifier receiver 101 in the response Fragment identified in list fragment.Next record identifier receiver 101 realizes step 706.
For itself, remote server 109 can start recording binary stream corresponding with the program to be recorded it Afterwards at any time from record identifier receiver 101 to 109 receives deletion and makes can request that.When it receives the request, It is determined which or which fragment can be deleted.For example, when removal request is from record identifier receiver 101, remote server 109 Using video program data storehouse to recognize the fragment sent by record identifier receiver 101, and in the middle of these fragments, it is stored in Fragment in the memory cell 203 of record identifier receiver 101.Then, according to predefined standard, which remote server 109 determines A little fragments can be deleted.For example, the predefined standard can be time standard.Therefore, remote server 109 can send with The list of the corresponding fragment of oldest fragment.
In one embodiment, the predefined standard is the standard that redundancy preserves fragment.In this embodiment, Multiple record identifier receiver in the middle of record identifier receiver 101 to 108 can store identical fragment.For example, when removal request is produced from During record identifier receiver 101, remote server 109 recognizes the piece sent by record identifier receiver 101 using video program data storehouse Section, and in the middle of these fragments, be stored in the memory cell 203 of record identifier receiver 101 and be also stored in record identifier receiver Fragment in the memory cell 203 of at least one other record identifier receiver in the middle of 102 to 108.Then, remote server 109 Can by with the memory cell 203 of at least one other record identifier receiver being stored in the middle of record identifier receiver 102 to 108 in piece The list of the corresponding fragment to be deleted of section is sent to record identifier receiver 101.
Fig. 8 schematically depict by remote server 109 realize it is of the invention for the long-range of video frequency program 3rd example of the method for record.In method in fig. 8, compressibility factor F is determined by remote server 109.In step 801 In, remote server 109 receives connection and opens request.Assume for the implementation of the method in Fig. 8, when in step 302 phase Between when sending connection and opening request, each record identifier receiver sends to remote server 109 and represents the video frequency program to be recorded Information.During step 801, remote server 109 waited predefined cycle D so as to from maximum quantity before continuation method Record identifier receiver obtain connection request to same video program.Predefined cycle D is for example to record past in request The cycle determined during video frequency program.The predefined cycle D causes to can ensure that by for recording the record of same video program All connection requests that receiver can make will be connect before remote server 109 determines compressibility factor F by remote server 109 Receive.Each connection request is corresponding with the record identifier receiver that must record video frequency program, is carried out by the quantity to connection request Count, remote server 109 can determine that the total Nmax of the record identifier receiver that record same program.Knowing in advance will record phase Cause to can determine that the record for being suitable for recording same video program is received with quantity Nmax of the record identifier receiver of video frequency program Compressibility factor F of quantity Nmax of device, therefore it is more conducive to the transmission of the allocated segment between record identifier receiver.So, it is available The transfer rate lower than the transfer rate of record identifier receiver is sending the fragment.
In step 802, remote server 109 determines compressibility factor F.It is assumed here that remote server 109 knows video Mean Speed DV of program and transfer rate DR of record identifier receiver.Then, remote server 109 select in DV/DR and Compressibility factor F between Nmax.If however, quantity MAX_C of connection that Nmax is received more than remote server 109, Remote server 109 selects the compressibility factor between DV/DR and MAX_C.Additionally, during step 809, remote server 109 select the N number of record identifier receiver of quantity from the Nmax record identifier receiver that record identical video frequency program, quantity N be less than or Equal to MAX_C.N=F in one embodiment.
In step 803, remote server 109 is initialized as variable n " 0 ".Variable n is selected N number of for traveling through Record identifier receiver.In step 804, remote server 109 opens the company with the n-th record identifier receiver in N number of record identifier receiver Connect.During step 805, remote server 109 receives the metadata of the n-th record identifier receiver in N number of record identifier receiver.Step 805 is identical with step 503.
In step 806, to determine whether deviant S for receiving in the metadata has been used to another for remote server 109 Record identifier receiver.Step 806 is identical with step 504.It is step 807 after step 806 if deviant S is used With step 808 (identical with step 505 and 506 respectively).
It is step 810 after step 808, tests for N number of record identifier receiver in step 810 period remote server 109 Whether connection has been opened.If situation is not so, variable n is increased into a unit in step 811 period and is remotely taken Business device 109 realizes again step 804.
If deviant S is also not used by, during the step 809 identical with step 507, remote server 109 from The involved record identifier receiver of n-th connection receives fragment.It is step 810 after step 809.
When N number of connection has been opened and has been received by with these corresponding fragments of connection, remote server 109 is in step Continue binary stream corresponding with video frequency program of recombinating during rapid 812.In the exemplary method described with regard to Fig. 8, it will be assumed that The fragment sends in the case where the meta data file of position of the fragment in binary stream is not indicated.In addition, root According to the measurement of size corresponding with the cycle, it will be assumed that the fragment has fixed size TD.In this case, long-range clothes Business device 109 must continue to analyze each fragment so as to binary stream of recombinating.Because being based on fixed size TD by binary stream During being divided into fragment, restructuring can be based on the search to the PTS stamps in the fragment.Then, the fragment is included according to them PTS stamps sorting and assembled with binary stream of recombinating.
In step 813, remote server 109 determines whether binary stream completes.For this purpose, remote server 109 is utilized Represent the letter of the finish time of the information of the start time of selected video frequency program and the selected video frequency program of expression Cease to calculate the duration of video frequency program, all fragments that then traversal is received are to determine the fragment using PTS Whether the duration is continuously covered.
If having received all fragments, in step 815 period remote server 109 in its video program data storehouse pin Information (for example, the beginning of the fragment of the period that the fragment is covered in video frequency program is represented to each fragment storage Moment and finish time).Additionally, during step 815, remote server 109 is by the binary stream record recombinated in its storage In unit 213.
In step 816, remote server 109 notices that binary stream is intactly preserved and relevant with video frequency program All metadata be stored in database.In step 817, remote server 109 is opened during being released in step 814 Connection.
If proving fragment loss during the step 813, during step 814, remote server 109 for example by At least one of record identifier receiver 101 to 108 sends the time period for representing that the fragment not received in video frequency program is covered Information come to lose fragment make request.
Until this moment the corresponding binary stream of the video frequency program that, we consider with record identifier receiver is received does not have mistake Ground is received.But, it can be common that occur during these binary streams are transmitted between video frequency program supplier and record identifier receiver Mistake.Two kinds of mistake can occur in binary stream.The mistake can cause to lose the fragment of binary stream or connect Packet receiving includes the fragment of the reverse binary stream of bit.When binary stream is divided into fragment, the bit by erroneous effects is received The record identifier receiver of stream has the risk for creating the fragment comprising mistake.
In one embodiment, each record identifier receiver can detect the mistake in the binary stream that it is received.For example, Each binary stream fragment that record identifier receiver is received with for determining that whether the fragment verification of mistake and associates.At this In the case of kind, record identifier receiver creates fragment only for the binary stream fragment not comprising any mistake for being received.As for example Found out using step 813 and 814, remote server 109 can detect the fragment of loss and ask addition.
In one embodiment, record identifier receiver cannot detect mistake.In this embodiment, remote server 109 The mistake in received fragment can be detected.Assume that each fragment is corresponding with integer image and each in this embodiment Individual image is broken down into quantity and fixes and macro block known to remote server 109 or CTB (coding tree block).May indicate that, term Macro block (and term CTB) is the square with image H.264/AVC used in standard (and H.265/HEVC standard) Or the corresponding term of rectangular block of pixels.For each image received in fragment, remote server 109 includes some decodings Macro block or CTB.When the macro block of decoding or the quantity of CTB are different from the fixed qty of macro block or CTB, the sound of remote server 109 The bright fragment includes mistake.Then, the fragment comprising mistake for being received is refused and by recording by remote server 109 Receiver re-request.
In one embodiment, remote server 109 can create redundancy to avoid weighing in the fragment for being received The fragment of new request error.In this embodiment, remote server 109 during step 802 by recording identical N is selected in the middle of Nmax record identifier receiver of video frequency program>FI record identifier receiver is caused than required more record identifier receiver Fragment can be sent.In one embodiment, N=2.F.So, some record identifier receiver using identical deviant S and Send identical fragment.Remote server 109 is found without mistake when identical fragment is received in the middle of the fragment for being received Fragment.Once finding and not having vicious fragment, remote server 109 just only retains the fragment, with the fragment identical fragment It is rejected.
One purpose of record video frequency program is can after a while to watch video frequency program.Figure 1B is shown schematically in and is connected to Watch use the first of the video frequency program being stored on remote server 109 on the display 110 of record identifier receiver 101 to show Example.In this example, record identifier receiver 101 is to the request viewing video frequency program of remote server 109.As response, according to pass In the method that Fig. 9 and Figure 10 is described, the transmission list of remote server 109, the list is directed to binary system corresponding with video frequency program Each fragment of stream is included should in the middle of the instruction record identifier receiver 102 to 108 of record identifier receiver 101 and remote server 109 To the information for where asking the fragment.In this example, only remote server 109 has the fragment.Therefore, record is received Device 101 receives all fragments from remote server 109.
Fig. 1 C are shown schematically in viewing on the display 110 for be connected to record identifier receiver 101 and are stored in remote service Second example of the realization of the video frequency program on device 109.In second example, record identifier receiver 103,104 and 108 is preserved The fragment of binary stream corresponding with the video frequency program to be watched.Therefore, remote server 109 is indicated to record identifier receiver 101 Which fragment can be obtained from record identifier receiver 103,104 and 108.Obtain from remote server 109 and be not also recorded receiver 103rd, the 104 and 108 loss fragment for preserving.Therefore, record identifier receiver 101 is from record identifier receiver 103,104 and 108 and from remote Journey server 109 receives all fragments, and this causes transship can not remote server 109.
Fig. 9 schematically depict and be connect being connected to record by what record identifier receiver (for example, record identifier receiver 101) was realized The example of the method for video frequency program of the record on remote server 109 is shown in the display device 110 for receiving device 101.For Fig. 9 Method, and for the method for Figure 10, it is assumed that some record identifier receiver in the middle of record identifier receiver 102 to 108 are by fragment It is stored in its memory cell 203 and remote server 109 has been in its database each fragment and preserves instruction record Which in the middle of receiver 101 and 108 and remote server 109 has the information of the fragment.In an embodiment In, remote server 109 systematically possesses all fragments.
In step 901, record identifier receiver 101 opens the connection with remote server 109.In step 902, record connects Receive device 101 and ask display video programs to remote server 109.In step 903, record identifier receiver 101 receives list, the row Table indicates that for each fragment of binary stream corresponding with the video frequency program to be shown the instruction fragment corresponds to video section Where the information of the index of which of purpose or the fragment and instruction find the information of the fragment period
In step 904, if the list that received of record identifier receiver 101 indicate must to record identifier receiver 102 to At least one other record identifier receiver (for example, record identifier receiver 102) in the middle of 108 asks some fragments, then record identifier receiver 101 open the connection with least one other record identifier receiver (here, record identifier receiver 102).
In step 905, record identifier receiver 101 is fixed as 0 starting clock by would indicate that the variable t of time.Become Amount t represents the moment in video frequency program.
In step 906, record identifier receiver 101 determined using the list received during the step 903 who have and when Carve the corresponding fragments of t.During the step 904, record identifier receiver 101 according to the result of step 906 to record identifier receiver 101 or The request pair fragment corresponding with moment t is sent to remote server 109.During step 908, record identifier receiver 101 is received The fragment asked.
During step 909, record identifier receiver 101 is gone to by the value of the size of value increase fragment TD by moment t Subsequent fragment.If being also not up to the duration D of video frequency program, record identifier receiver 101 in step 910 moment period t Return to step 907.
If moment t is more than the duration D of program, record identifier receiver 101 goes to the restructuring two during step 911 and enters System flows and in step 912 period display video programs.
Can with step 912 after or step 911 and 912 during realize the step of 913 during, record identifier receiver 101 are released in the connection opened step 901 (and step 904) period.
Figure 10 schematically shows the permission realized by remote server 109 in the display for being connected to record identifier receiver 101 The example of the method for video frequency program of the record on remote server 109 is shown on device 110.
In step 1001, remote server 109 opens the connection with record identifier receiver (for example, record identifier receiver 101). In step 1002, remote server 109 receives the request of display program.For this purpose, record identifier receiver 101 is to remote server 1109 have sent the information for representing the program to be shown.
In step 1003, remote server 109 is determined for sending the fragment to the record of record identifier receiver 101 Quantity K of receiver.Selecting for the record identifier receiver of quantity K can be based on the mark for distributing traffic load between record identifier receiver It is accurate.Purpose is the whole transfer rate of not exclusive record identifier receiver so that another receiver displayable video program, but makes With the fraction of the transfer rate of multiple record identifier receiver.
In step 1004, remote server 109 determines that who has in the middle of record identifier receiver 101 to 108 in addition to it Fragment corresponding with the video frequency program to be shown.For this purpose, it travel through be stored in its video program data storehouse with to be shown K record identifier receiver of the fragment of the corresponding metadata of video frequency program and searching with the video frequency program to be shown.For institute Whether each record identifier receiver of identification, remote server 109 determines the record identifier receiver already engaged in the re-transmission of fragment.Do not weigh With the record identifier receiver of the re-transmission already engaged in fragment.
During step 1005, remote server 109 is checked and is identified as that asked section purpose fragment can be sent The record identifier receiver of quantity k.If k<K, then quantity k of the record identifier receiver for being recognized is less than the record identifier receiver to be used Quantity k, its own of remote server 109 replaces the record identifier receiver of K-k loss.Therefore, remote server 109 participates in passing The defeated fragment for showing the video frequency program that record identifier receiver 101 is asked.Under specific circumstances, if without record identifier receiver Fragment with the video frequency program asked, then remote server 109 is the only transmission fragment.
After step 1006, fragment corresponding with the video frequency program asked can be sent at least if identified K record identifier receiver, then remote server 109 realize step 1007, it creates list during the step 1007, and the list is directed to When each fragment of binary stream corresponding with the program asked is comprising indicating which of video frequency program be the fragment correspond to Where the information of the index of section or the fragment and instruction find the information of the fragment.The list connects corresponding to record Receive the list that device 101 is received during step 903.
During step 1008, list is sent to record identifier receiver 101 so that it can continue the reality of the method in Fig. 9 It is existing.
In one embodiment, can send and the video frequency program pair to be shown if identified during step 1004 The fragment answered more than K record identifier receiver, then remote server 109 is randomly assigned the K in them.
In one embodiment, can send and the video frequency program pair to be shown if identified during step 1004 The fragment answered more than K record identifier receiver, then remote server 109 specifies it by standard of the distance between record identifier receiver In K.Select the record identifier receiver near record identifier receiver 101.By to pass through so that the two records connect Receiving the quantity of the router that device can communicate carries out counting to calculate the distance between two record identifier receiver.If in order at two Communicate and the negligible amounts of the router to be passed through between record identifier receiver, then state that two record identifier receiver are close.
In one embodiment, can send and the video frequency program pair to be shown if identified during step 1004 The fragment answered more than K record identifier receiver, then remote server 109 is specified and belong in them identical linking Internet provider K.The record identifier receiver of the user for preferably belonging to subscribe to identical linking Internet provider.

Claims (22)

1. it is a kind of record video frequency program method, the video frequency program by must by the video frequency program record in remote server On at least one receiver for being referred to as record identifier receiver received in the form of binary stream, each record identifier receiver is by logical Communication network is connected to the remote server and is characterized by transfer rate, and the binary stream is characterized by code rate, and it is special Levy and be, methods described is realized and for record identifier receiver by each record identifier receiver, be the method comprising the steps of：
- (3051) video frequency program compressibility factor is obtained,
- binary stream is split into the set of continuous fragment by (3054) according to the compressibility factor for being obtained,
- true from the set of the continuous fragment according to the difference between deviant and fragment corresponding with the compressibility factor Fixed (3055) will send the subset of the fragment to the remote server, and the deviant is determined by the record identifier receiver Random number divides exactly the remainder of the compressibility factor, and
Fragments for transport (307) in-subset of fragment by determined by is to the remote server to preserve.
2. method according to claim 1, it is characterised in that：The compressibility factor is according to video frequency program coding speed Rate, the transfer rate of the record identifier receiver, to record the video frequency program record identifier receiver quantity, described long-range The quantity of the quantity of the connection that server is allowed and/or the video frequency program recorded simultaneously by the record identifier receiver is calculating.
3. method according to claim 2, it is characterised in that：The compressibility factor is by the record identifier receiver or by general The compressibility factor sends to the remote server of the record identifier receiver and calculates.
4. the method according to claim 1,2 or 3, it is characterised in that：According to the size of the quantity for representing binary data Measurement, the fragment in the set of the continuous fragment has fixed size.
5. the method according to claim 1,2 or 3, it is characterised in that：It is described according to the size measurement for representing the duration Fragment in the set of continuous fragment has fixed size, each fragment in the set of the continuous fragment and the video Fixed time interval correspondence in program.
6. the method according to any one of claim 1 to 5, it is characterised in that：In the set of the continuous fragment The order that fragment occurs according to them in the binary stream sorting, and when determination will be sent to the remote server The fragment subset when, the record identifier receiver is described continuous by beginning stepping through from fragment corresponding with the deviant The set of fragment, selects the following multiple fragments in the set of (305) the continuous fragment, i.e. the plurality of fragment is spaced apart Equal to the fragment of the quantity of the difference between the fragment.
7. the method according to any one of claim 1 to 6, it is characterised in that：In the subset for transmitting the fragment Fragment before, the record identifier receiver to the remote server send (306) represent the video frequency program including described The set of the metadata of the value of the size of deviant, the compressibility factor and the expression fragment.
8. method according to claim 7, it is characterised in that：When the record identifier receiver is informed by the remote server When another record identifier receiver that the video frequency program must be recorded is associated with identical deviant, the record identifier receiver interrupts institute State the transmission of fragment.
9. method according to claim 8, it is characterised in that：The record identifier receiver is also by the set of the continuous fragment In fragment or the fragment subset in fragment be stored in the local storage unit of the remote server.
10. method according to claim 9, it is characterised in that：The record identifier receiver is periodically to the long-range clothes Business device sends (703) and authorizes the request for deleting fragment, and is receiving the positive response to authorizing the request for deleting fragment In the case of, fragment of the deletion record in the local storage unit.
11. methods according to claim 9, it is characterised in that：By at least part of record of the binary stream in institute After stating on remote server, the record identifier receiver sends (902) and shows the video frequency program to the remote server Request, from the remote server and/or at least one other record identifier receiver from the fragment for saving the binary stream (908) described fragment corresponding with the binary stream is received, and (911) described binary stream of recombinating is to show.
12. it is a kind of record video frequency program methods, the video frequency program by must by the video frequency program record in remote service At least one receiver for being referred to as record identifier receiver on device is received in the form of binary stream, and each record identifier receiver passes through Communication network is connected to the remote server and is characterized by transfer rate, and the binary stream is characterized by code rate, institute State method to comprise the following steps when being realized by the remote server：
- (503) at least one collection of metadata are obtained, each collection of metadata is sent and including skew by record identifier receiver Value, the deviant is that the random number determined by the record identifier receiver divides exactly the compressibility factor obtained by the record identifier receiver Remainder,
- (504) are found in the set for send the record identifier receiver of metadata of the video frequency program with identical deviant pass The record identifier receiver of connection,
- each different deviant for being received receives (507) institute from least one record identifier receiver in the form of fragment Binary stream is stated, the binary stream is divided into each record identifier receiver the set of continuous fragment according to the compressibility factor, And according to the difference between the deviant and fragment corresponding with the compressibility factor from the set of the continuous fragment Middle determination each record identifier receiver is sent to the fragment of the remote server, and
- (508) described binary stream of recombinating is so that the binary stream is stored in the memory cell of the remote server.
13. methods according to claim 12, it is characterised in that：For each different deviant for being received to A few record identifier receiver received after the fragment, and some fragments lack the restructuring for preventing the binary stream, institute State remote server and send the information that (510) represent at least one fragment lost at least one record identifier receiver, so that Send the fragment of each loss.
14. methods according to claim 12 or 13, it is characterised in that：Piece is deleted mandate is received from record identifier receiver After the request of section, the remote server to the deletion that the record identifier receiver sends the list including the fragment to be deleted is awarded Power.
15. methods according to claim 12,13 or 14, it is characterised in that：For received each is different inclined Shifting value is opened before connection (804) at least one record identifier receiver, and the remote server waits (801) predefined week Phase.
16. methods according to any one of claim 12 to 15, it is characterised in that：When fragment is received, each Fragment is associated with descriptor, the descriptor include representing the information of the position of each fragment in the binary stream and Represent the information of the record identifier receiver for sending each fragment.
17. methods according to claim 16, it is characterised in that：It is described long-range when after the binary stream of recombinating When server receives the request of the display video frequency program from the first record identifier receiver, the remote server constructs list, should List indicates to include at least the one of the local storage unit for preserving the fragment at least one fragment of the binary stream Individual second record identifier receiver.
A kind of 18. reception devices that can remotely record the binary stream for representing video frequency program, it is characterised in that the reception Device includes：
- for obtain (3051) described video frequency program compressibility factor device,
- for the binary stream to be split into (3054) into the device of the set of continuous fragment according to the compressibility factor for being obtained,
- it is used for the set from the continuous fragment according to the difference between deviant and fragment corresponding with the compressibility factor Middle determination (3055) will send the device of the subset to the fragment of remote server device, and the deviant is filled by described reception The random number for putting determination divides exactly the remainder of the compressibility factor,
- for the fragment in the subset of fragment by determined by (307) are sent to the remote server device so as to preservation Device.
A kind of 19. server units for being able to record that the binary stream for representing video frequency program, it is characterised in that the server dress Put including：
- be used to obtain the device of (503) at least one collection of metadata, each collection of metadata is sent by reception device and is wrapped Include deviant, the deviant be the random number determined by the reception device divide exactly the compression that obtained by the reception device because The remainder of son,
- for the searching (504) in the set for send the reception device of metadata of the video frequency program and identical deviant The device of the reception device of association,
- received (507) in the form of fragment from least one reception device for being directed to each the different deviant for being received The binary stream is divided into continuous fragment by the device of the binary stream, each reception device according to the compressibility factor Set, and according to the difference between the deviant and fragment corresponding with the compressibility factor from the continuous fragment Determine that each reception device is sent to the fragment of the server unit in set, and
- be used to recombinate (508) described binary stream so that the binary stream to be stored in the storage list of the server unit Device in unit.
A kind of 20. systems for recording video frequency program, the system is received including according to claim 18 at least one Device and server unit according to claim 19.
21. a kind of computer programs, it is characterised in that the computer program includes instruction, described instruction is used for Realized according to any one of claim 1 to 11 by described device in computing device of the described program by device Method or the method according to any one of claim 12 to 17.
22. a kind of storage devices, it is characterised in that the computer program of the storage device storage comprising instruction, the instruction For being realized according to any one of claim 1 to 11 institute by described device in computing device of the described program by device The method stated or the method according to any one of claim 12 to 17.
CN201580048253.9A 2014-07-08 2015-07-07 For recording method, reception device, server unit and the system of video program Expired - Fee Related CN106688240B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR1456571 2014-07-08
FR1456571A FR3023665B1 (en) 2014-07-08 2014-07-08 METHOD AND DEVICE FOR REMOTELY RECORDING VIDEO PROGRAMS.
PCT/EP2015/065416 WO2016005353A1 (en) 2014-07-08 2015-07-07 Method and device for remotely recording video programs

Publications (2)

Publication Number Publication Date
CN106688240A true CN106688240A (en) 2017-05-17
CN106688240B CN106688240B (en) 2019-11-05

Family

ID=52358835

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201580048253.9A Expired - Fee Related CN106688240B (en) 2014-07-08 2015-07-07 For recording method, reception device, server unit and the system of video program

Country Status (6)

Country Link
US (1) US10264307B2 (en)
EP (1) EP3167617B1 (en)
CN (1) CN106688240B (en)
BR (1) BR112017000329A2 (en)
FR (1) FR3023665B1 (en)
WO (1) WO2016005353A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113767584A (en) * 2019-04-25 2021-12-07 松下电器（美国）知识产权公司 Terminal, base station, receiving method and transmitting method

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3068552B1 (en) 2017-06-28 2021-04-02 Tdf PROCESS FOR RECEIVING AUDIO CONTENT IN A HYBRID RECEIVER AND DELAYED REPRODUCTION, RECEIVER AND PROGRAM ASSOCIATED WITH THE PROCESS
FR3068554B1 (en) * 2017-06-28 2020-07-17 Tdf METHOD FOR TRANSMITTING INTERRUPTED AUDIO CONTENT IN A HYBRID RECEIVER, SYSTEM, RECEIVER AND PROGRAM ASSOCIATED WITH THE METHOD
US10375441B2 (en) 2017-12-28 2019-08-06 Dish Network L.L.C. Locally generated spot beam replacement
US10820023B2 (en) 2017-12-28 2020-10-27 Dish Network L.L.C. Remotely generated encoding metadata for local content encoding

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060248553A1 (en) * 2005-04-28 2006-11-02 Microsoft Corporation Downloading previously aired programs using peer-to-peer networking
CN102740156A (en) * 2011-04-11 2012-10-17 深圳创维数字技术股份有限公司 Program playback realization method for set-top box, set-top box, server and system
US20140013368A1 (en) * 2011-06-29 2014-01-09 Thomson Licensing Managing common content on a distributed storage system
CN103596036A (en) * 2013-11-12 2014-02-19 浪潮齐鲁软件产业有限公司 Method for intelligent buffering of streaming media player

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7028329B1 (en) * 2000-10-13 2006-04-11 Seiko Epson Corporation Remote accessible programming
WO2008113948A1 (en) * 2007-02-26 2008-09-25 France Telecom Method for the distributed recording of a multimedia flow, and corresponding device and computer software product
KR20140033312A (en) * 2010-10-21 2014-03-18 홀리브레인 비브이비에이 Method and apparatus for neuropsychological modeling of human experience and purchasing behavior
EP3140994B1 (en) * 2014-05-06 2022-03-16 TiVo Solutions Inc. Cloud-based media content management

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060248553A1 (en) * 2005-04-28 2006-11-02 Microsoft Corporation Downloading previously aired programs using peer-to-peer networking
CN102740156A (en) * 2011-04-11 2012-10-17 深圳创维数字技术股份有限公司 Program playback realization method for set-top box, set-top box, server and system
US20140013368A1 (en) * 2011-06-29 2014-01-09 Thomson Licensing Managing common content on a distributed storage system
CN103596036A (en) * 2013-11-12 2014-02-19 浪潮齐鲁软件产业有限公司 Method for intelligent buffering of streaming media player

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113767584A (en) * 2019-04-25 2021-12-07 松下电器（美国）知识产权公司 Terminal, base station, receiving method and transmitting method
CN113767584B (en) * 2019-04-25 2024-01-26 松下电器（美国）知识产权公司 Terminal, base station, receiving method and transmitting method

Also Published As

Publication number Publication date
CN106688240B (en) 2019-11-05
US10264307B2 (en) 2019-04-16
FR3023665A1 (en) 2016-01-15
FR3023665B1 (en) 2016-08-19
US20170171586A1 (en) 2017-06-15
BR112017000329A2 (en) 2017-11-07
EP3167617B1 (en) 2019-08-28
WO2016005353A1 (en) 2016-01-14
EP3167617A1 (en) 2017-05-17

Similar Documents

Publication Publication Date Title
US11245940B2 (en) Method and apparatus for transmitting media data in multimedia transport system
CN103188522B (en) Method and system for providing and delivering a composite condensed stream
US9462307B2 (en) ABR live to VOD system and method
CN105474650B (en) For determining the concept of the quality of media data flow that modified quality versus spy leads
CN106134146B (en) Handle continuous multicycle content
CN106688240B (en) For recording method, reception device, server unit and the system of video program
KR101885852B1 (en) Method and apparatus for transmitting and receiving content
CN104584571B (en) Audio-frequency fingerprint sequence is produced at set top box
US20100223648A1 (en) Implementation Method And System For A Media-On-Demand Frame-Spanning Playing Mode In A Peer-To-Peer Network
CN101217638A (en) A downloading method, system and device of video file fragmentation
CN103609131A (en) Reception device, reception method, transmission device, transmission method, and program
US20070078954A1 (en) Apparatus and method for providing high speed download service of multimedia contents
CN106657143A (en) Streaming media transmission method and device, server and terminal
CN109511011B (en) YouTube DASH encrypted video-oriented fingerprint database construction method
JP2010539834A (en) Apparatus and method for storing and reading a file having a media data container and a metadata container
CN110267117A (en) A kind of processing method and Streaming Media processing server of stream medium data
CN111629283B (en) Multi-stream media gateway service system and method
KR20130088036A (en) Hybrid delivery mechanism in a multimedia transmission system
CN105812961B (en) Adaptive stream media processing method and processing device
CN105916011A (en) Video real-time playing method and device
CN101969447A (en) Method and system for supplying stream media service
US8316398B2 (en) Method for sending multimedia content to at least one multimedia unit, method for processing said multimedia content and multimedia unit for the implementation of these methods
AU2015101273A4 (en) A computer implemented system and method for transferring multimedia content
WO2015027860A1 (en) Video service processing method and apparatus, and network device
JP2007267144A (en) Method for distributing information, server device and program

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20191105

Termination date: 20210707